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PLS 103: Exam 1 with 100% correct answers rated
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PLS 103: Exam 1Crops can be used directly to feed us (people), or to feed farm animals (cows, hogs etc.), or for purposes
not related to food (such as making biofuels to power our cars and trucks). Is CORN used for all these
purposes? - correct answer ✔✔Yes, for all three of them
Agriculture is important to a nation's economy as well as to its requirement for food - True or False? -
correct answer ✔✔True
Is agriculture in the U.S. our nation's largest use of land, soil and water? - correct answer ✔✔Yes
How long ago is agriculture thought to have begun? - correct answer ✔✔10,000 years ago
Agriculture is practiced on which one of these environmental systems? - correct answer
✔✔Agroecosystem
Crops can be used directly to feed us (people), or to feed farm animals (cows, hogs etc.), or for purposes
not related to food (such as making biofuels to power our cars and trucks). Is ALFALFA used for all these
purposes? - correct answer ✔✔No, not for all three of them
Agriculture is very productive in the U.S. because we have which one of these conditions? - correct
answer ✔✔Both good soils and favorable climates for growing crops
Our existence on Earth depends on plants. - True or False? - correct answer ✔✔True
What percentage of the U.S. population is directly working in agriculture today? - correct answer ✔✔2%
Both better food availability, and better medical care, have contributed to overall world population
growth. - correct answer ✔✔True
, Hunger in developing countries is typically caused or worsened by which one of these factors or groups
of factors? - correct answer ✔✔Global economic crisis, poverty, and war
Cereal crop yields (harvested tons/acre) have increased, or decreased, in most countries since the
1960s? - correct answer ✔✔Increased
In which one of these areas is the population increasing much faster than in the U.S? - correct answer
✔✔Africa
Food production per capita (i.e. per person) in the world, since the 1960s, has increased slightly overall. -
correct answer ✔✔True
What is the world's human population expected to be by the year 2050? - correct answer ✔✔9 billion
Today there is no longer any food insecurity in the world. - correct answer ✔✔False
Over the long-term (past 50 years) and in general, how have food prices in the world changed? - correct
answer ✔✔Decreased
In which one of these regions would you expect to find the economically poorest people? - correct
answer ✔✔Sub-Saharan Africa
Proteins are made up of which of the following smaller types of molecules? - correct answer ✔✔Amino
Acids
Which one of these minerals, or combinations of minerals, must we have in our diet? - correct answer
✔✔Calcium, potassium, copper
How many kinds of vitamins that we obtain from our food are considered to be essential? - correct
answer ✔✔13
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